50 University of California Publications in Botany. [ VOL - 3 



Bear Valley, in the Transition Zone of the San Bernardino 

 Mts., apparently very local : Parish, Aug. 1882, no. 1558 ; Abrams, 

 Aug., 1902, no. 2917. A segregate from H. lanceolatus (Hook.) 

 T. & G., distinguished by its slender involucral bracts destitute 

 of green tips and by its loose cottony pubescence. 



H. APARGIOIDES has the general appearance of H. gossypinus, 

 but the leaves are laciniate and the linear achenes are glabrous 

 or nearly so. Ace. to Gray 7 , it was collected in the San Bernar- 

 dino Mts. by Parry, but there is probably an error in the label, 

 since diligent search has failed to rediscover the species south of 

 Tulare Co. 



2. H. gracilis (Nutt.) Gray, PL Fendl. 76 (1849). Dieteria 

 gracilis Nutt., Journ. Phila. Acad. n. ser. i. 177 (1848). Erio- 

 carpum gracile Greene, Eryth. ii. 109 (1894). 



Plant annual, erect, a few cm. to 2 dm. high ; the solitary stem 

 simple or branched: herbage canescent, rarely glabrate or 

 scabrous: principal leaves oblanceolate or narrower, 1 to 3 cm. 

 long, pinnatifid, each lobe ending in a slender bristle; upper 

 leaves linear, entire or only toothed, bristle-tipped: involucre 

 broadly hemispheric, 6 or 7 mm. high, imbricated; bracts linear, 

 tapering above into a bristle : rays 20 to 25, yellow, nearly 1 cm. 

 long : achenes canescent : pappus sordid or yellowish, of numer- 

 ous rigid bristles thickened at base, the longer ones equalling the 

 corollas. 



Providence Mts., eastern part of the Mohave Desert, Jun. 6 ? 

 1902, Brandegee; Lower California, Arizona, Utah, etc. 



H. SPINULOSUS (Pursh.) DC. ranges from the Saskatchewan 

 to Lower California and may be expected in our district. It 

 is a perennial with broader leaves than H. gracilis. 



3. H. junceus Greene, Bull. Calif. Acad. i. 190 (1885). Erio- 

 carpum junceum Greene, Eryth. ii. 108 (1894). 



Commonly 5 to 10 dm. high, the slender wiry stems tufted 

 from a woody base and sparsely leafy : herbage nearly or quite 

 glabrous, the involucres viscid and scabrous: leaves .5 to 2 cm. 

 long, linear, pinnatifid and the lobes spinulose-tipped, or the 

 upper ones entire and tipped with a white mucro: involucre 

 7Bot. Calif, ii. 464 (1880). 



